1. Enter the data in the calculator lists. Place the data in L1 and L2.
STAT, #1Edit, type values into the lists
2. Prepare a scatter plot of the data.
Set up for the scatterplot.
2nd StatPlot - choices shown at right.
Choose ZOOM #9 ZoomStat. Graph shown below.
3. Have the calculator determine the line of best fit.
STAT → CALC #4 LinReg(ax+b)
Include the parameters L1, L2, Y1.
(Y1 comes from VARS → YVARS, #Function, Y1)
You now have the values of a and b needed to write the equation of the line of best fit. See values below.
y = 11.73128088x + 193.8521475
4. Graph the line of best fit.
Simply hit GRAPH.
To get a predicted value within the window, hit TRACE, up arrow, and type the desired value.
By using this chart you can estimate a seccond value according to a first value.
Line of Best Fit
STAT, #1Edit, type values into the lists
Set up for the scatterplot.
2nd StatPlot - choices shown at right.
Choose ZOOM #9 ZoomStat. Graph shown below.
STAT → CALC #4 LinReg(ax+b)
Include the parameters L1, L2, Y1.
(Y1 comes from VARS → YVARS, #Function, Y1)
You now have the values of a and b needed to write the equation of the line of best fit. See values below.
y = 11.73128088x + 193.8521475
Simply hit GRAPH.
To get a predicted value within the window, hit TRACE, up arrow, and type the desired value.
*Calculator instructions found at http://regentsprep.org/Regents/math/data/linefitcalc.html
This Slide Show Shows How to do an Accelerated Math Question.